{"version":3,"file":"to-response.mjs","names":[],"sources":["../src/to-response.ts"],"sourcesContent":["import { APIError } from \"./error\";\nimport { isAPIError } from \"./utils\";\n\nfunction isJSONSerializable(value: any) {\n\tif (value === undefined) {\n\t\treturn false;\n\t}\n\tconst t = typeof value;\n\tif (t === \"string\" || t === \"number\" || t === \"boolean\" || t === null) {\n\t\treturn true;\n\t}\n\tif (t !== \"object\") {\n\t\treturn false;\n\t}\n\tif (Array.isArray(value)) {\n\t\treturn true;\n\t}\n\tif (value.buffer) {\n\t\treturn false;\n\t}\n\treturn (\n\t\t(value.constructor && value.constructor.name === \"Object\") ||\n\t\ttypeof value.toJSON === \"function\"\n\t);\n}\n\nfunction safeStringify(\n\tobj: any,\n\treplacer?: (key: string, value: any) => any,\n\tspace?: string | number,\n): string {\n\tlet id = 0;\n\tconst seen = new WeakMap<object, number>(); // ref -> counter\n\n\tconst safeReplacer = (key: string, value: any) => {\n\t\t// Handle bigint first\n\t\tif (typeof value === \"bigint\") {\n\t\t\treturn value.toString();\n\t\t}\n\n\t\t// Then handle circular references\n\t\tif (typeof value === \"object\" && value !== null) {\n\t\t\tif (seen.has(value)) {\n\t\t\t\treturn `[Circular ref-${seen.get(value)}]`;\n\t\t\t}\n\t\t\tseen.set(value, id++);\n\t\t}\n\n\t\t// Finally apply any custom replacer\n\t\tif (replacer) {\n\t\t\treturn replacer(key, value);\n\t\t}\n\n\t\treturn value;\n\t};\n\n\treturn JSON.stringify(obj, safeReplacer, space);\n}\n\nexport type JSONResponse = {\n\tbody: Record<string, any>;\n\trouterResponse: ResponseInit | undefined;\n\tstatus?: number;\n\theaders?: Record<string, string> | Headers;\n\t_flag: \"json\";\n};\n\nfunction isJSONResponse(value: any): value is JSONResponse {\n\tif (!value || typeof value !== \"object\") {\n\t\treturn false;\n\t}\n\treturn \"_flag\" in value && value._flag === \"json\";\n}\n\n/**\n * Headers that MUST be stripped when building an HTTP response from\n * arbitrary header input. These are request-only, hop-by-hop, or\n * transport-managed headers that cause protocol violations when present\n * on responses (e.g. Content-Length mismatch → net::ERR_CONTENT_LENGTH_MISMATCH).\n *\n * Sources:\n *   - RFC 9110 §10.1   (Request Context Fields)\n *   - RFC 9110 §7.6.1  (Connection / hop-by-hop)\n *   - RFC 9110 §11.6-7 (Authentication credentials)\n *   - RFC 9110 §12.5   (Content negotiation)\n *   - RFC 9110 §13.1   (Conditional request headers)\n *   - RFC 9110 §14.2   (Range requests)\n *   - RFC 6265 §5.4    (Cookie)\n *   - RFC 6454         (Origin)\n */\nconst REQUEST_ONLY_HEADERS = new Set([\n\t// Request context (RFC 9110 §10.1)\n\t\"host\", // §7.2\n\t\"user-agent\", // §10.1.5\n\t\"referer\", // §10.1.3\n\t\"from\", // §10.1.2\n\t\"expect\", // §10.1.1\n\n\t// Authentication credentials (RFC 9110 §11.6-7)\n\t\"authorization\", // §11.6.2\n\t\"proxy-authorization\", // §11.7.2\n\t\"cookie\", // RFC 6265 §5.4\n\t\"origin\", // RFC 6454\n\n\t// Content negotiation (RFC 9110 §12.5)\n\t\"accept-charset\", // §12.5.2 (deprecated)\n\t\"accept-encoding\", // §12.5.3\n\t\"accept-language\", // §12.5.4\n\n\t// Conditional requests (RFC 9110 §13.1)\n\t\"if-match\", // §13.1.1\n\t\"if-none-match\", // §13.1.2\n\t\"if-modified-since\", // §13.1.3\n\t\"if-unmodified-since\", // §13.1.4\n\t\"if-range\", // §13.1.5\n\n\t// Range requests (RFC 9110 §14.2)\n\t\"range\", // §14.2\n\n\t// Forwarding control (RFC 9110 §7.6)\n\t\"max-forwards\", // §7.6.2\n\n\t// Hop-by-hop (RFC 9110 §7.6.1)\n\t\"connection\", // §7.6.1\n\t\"keep-alive\",\n\t\"transfer-encoding\",\n\t\"te\", // §10.1.4\n\t\"upgrade\",\n\t\"trailer\",\n\t\"proxy-connection\", // non-standard\n\n\t// Valid on responses but WRONG if copied from request (RFC 9110 §8.6)\n\t\"content-length\",\n]);\n\nfunction stripRequestOnlyHeaders(headers: Headers): void {\n\tfor (const name of REQUEST_ONLY_HEADERS) {\n\t\theaders.delete(name);\n\t}\n}\n\nexport function toResponse(data?: any, init?: ResponseInit): Response {\n\tif (data instanceof Response) {\n\t\tif (init?.headers) {\n\t\t\tconst safeHeaders = new Headers(init.headers);\n\t\t\tstripRequestOnlyHeaders(safeHeaders);\n\t\t\tsafeHeaders.forEach((value, key) => {\n\t\t\t\tdata.headers.set(key, value);\n\t\t\t});\n\t\t}\n\t\treturn data;\n\t}\n\tconst isJSON = isJSONResponse(data);\n\tif (isJSON) {\n\t\tconst body = data.body;\n\t\tconst routerResponse = data.routerResponse;\n\t\tif (routerResponse instanceof Response) {\n\t\t\treturn routerResponse;\n\t\t}\n\t\tconst headers = new Headers();\n\t\tif (routerResponse?.headers) {\n\t\t\tconst headers = new Headers(routerResponse.headers);\n\t\t\tfor (const [key, value] of headers.entries()) {\n\t\t\t\theaders.set(key, value);\n\t\t\t}\n\t\t}\n\t\tif (data.headers) {\n\t\t\tfor (const [key, value] of new Headers(data.headers).entries()) {\n\t\t\t\theaders.set(key, value);\n\t\t\t}\n\t\t}\n\t\tif (init?.headers) {\n\t\t\tconst safeHeaders = new Headers(init.headers);\n\t\t\tstripRequestOnlyHeaders(safeHeaders);\n\t\t\tfor (const [key, value] of safeHeaders.entries()) {\n\t\t\t\theaders.set(key, value);\n\t\t\t}\n\t\t}\n\n\t\theaders.set(\"Content-Type\", \"application/json\");\n\t\treturn new Response(JSON.stringify(body), {\n\t\t\t...routerResponse,\n\t\t\theaders,\n\t\t\tstatus: data.status ?? 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